This is what I use. It's the best:
https://www.tempurpedic.com/other-products/lumbar-support-cushion-travel/
Can also be had at Amazon.
The lack of a power (vs. manual) lumbar support in the Mazda 3 is disappointing. Mazda 6 GT has 8-way power-adjustable driver's seat with power lumbar adjustment and memory settings.
Disappointingly not in Mazda 3. I guess Mazda thinks drivers of these vehicles don't have back problems.
https://www.tempurpedic.com/other-products/lumbar-support-cushion-travel/
Can also be had at Amazon.
The lack of a power (vs. manual) lumbar support in the Mazda 3 is disappointing. Mazda 6 GT has 8-way power-adjustable driver's seat with power lumbar adjustment and memory settings.
Disappointingly not in Mazda 3. I guess Mazda thinks drivers of these vehicles don't have back problems.